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Defining Data
Introduction
Data are facts, information, observations and measurements that are used to make discoveries and to support informed decisions. A dataset, which is a collection of data may come in different formats and structures, and will usually be based on its source, ot where the data came from. For example, a company's monthly earnings might be in a spreadsheet but hourly heart rate data from a smartwatch may be in JSON format. It's common for data scientists to work with different types of data within a dataset.
This lesson focuses on identifying and classifying data by its characteristics and its sources.
Pre-Lecture Quiz
Pre-lecture quiz
The 5 V's of Big Data
Velocity
The speed at which data is collected.
Veracity
The quality of the data. Was is collected ethically?
Variety
Structured Semi-Structured Unstructured
Value
Is the data complete?
Volume
The amount of data collected.
Sources of Data
🚀 Challenge
Post-Lecture Quiz
Post-lecture quiz